something I found that might help GDI hackers

[Jonathan Wilson]

struct GDIHandleBitFields {
    unsigned long Index:0:10;
    unsigned long Type:10:5;
    unsigned long AltType:15:2;
    unsigned long Stock:17:1;
    unsigned long Unique:18:8;
};

This might help people trying to understand the inner workings of GDI...
Its current as of windows XP SP1.

[Dmitry Timoshkov]

"Jonathan Wilson"  wrote:
> struct GDIHandleBitFields {
> unsigned long Index:0:10;
> unsigned long Type:10:5;
> unsigned long AltType:15:2;
> unsigned long Stock:17:1;
> unsigned long Unique:18:8;
> };
>
> This might help people trying to understand the inner workings of GDI...
> Its current as of windows XP SP1.

Internal presentation of GDI handles is well described in the Feng Yuan's
book "Windows Graphics Programming". The struct above has a good coincidence
with his findings.

Among other things that book has a good article about internal presentation
of regions.